Effects of Cr,Co,Ni substitution at Mn-site on structural, magnetic properties and critical behaviour in Nd0.67Ba0.33MnO3 mixed-valent manganite

• Published in: Journal of magnetism and magnetic materials 2022-04, Vol.548, p.168980, Article 168980
• Main Authors: Sudakshina, B., Suneesh, M.V, Arun, B., Chandrasekhar Kakarla, D., Vasundhara, M.
• Format: Article
• Language: English
• Subjects: Critical exponents and magnetocaloric effect; Crystal structure; Crystallization; Doping; Isotherms; Magnetic properties; Magnetic transitions; Manganese; Mixed-valent manganites; Nickel; Parameter identification; Short range order; Substitutes; Transition temperature; XAS
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2021.168980

•We have studied the effect of Transitional ions (Cr,Co and Ni) substitution on structural, magnetic properties, critical behaviour in Nd0.67Ba0.33MnO3 manganite.•Crystal structure of Nd0.67Ba0.33MnO3 manganite is witnessed to be unaltered with the substitution of Tr ions at the Mn-site.•Nd0.67Ba0.33MnO3 and Cr,Co,Ni-substituted compounds show second order magnetic transition due to DE interactions, but, reduces the Tc without getting effected the low temperature magnetic ordering caused due to Nd3+ ions.•Critical exponent analysis obtained from different techniques reveal that the Nd0.67Ba0.33MnO3 does not belong to any of the theoretical model, but all the substituted samples govern 3D Heisenberg interactions models with short-range order.•Maximum magnetic entropy change is obtained for Nd0.67Ba0.33MnO3 while decreases with the substituted compounds. This work investigates on the crystal structure, magnetic nature and critical behaviour with the partial replacement of transition (Tr) elements (ie., 10% of Cr, Co, Ni) at the Mn-site of Nd0.67Ba0.33MnO3 (NBMO) synthesised via conventional solid-state-method. NBMO compound is crystallised into an orthorhombic crystal structure and possess a magnetic transition temperature (Tc) at 145 K. Crystal structure of NBMO remains the same with partial substitution of Tr elements but, the Tc is found to be slightly increased with the doping of Cr, while decreases with the doping of Co and Ni. The magnetic isotherms are traced, and critical exponents are studied using modified Arrott plots (MAP) and power law. All the substituted samples show a second-order nature of Tc similar to that of the parent compound. The critical parameters are identified and verified through MAP, critical isotherms, Kouvel-Fisher method and field dependence of entropy change. All the substituted compounds govern the 3D Heisenberg with short-range order.